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A Distributed Model for Real-Time Flood Forecasting in the Godavari Basin Using Space Inputs

International Journal of Disaster Risk Science 2011年第3期2卷 31-40页

作者： korada hari venkata durga rao Vala Venkateshwar rao Vinay Kumar Dadhwal Gandarbha Behera Jaswant Raj Sharma National Remote Sensing Centre Indian Space Research Organization (ISRO) Hyderabad 500 625 India

Hydrological modelling of large river catchments has become a challenging task for water resources engineers due to its complexity in collecting and handling of both spatial and non-spatial data such as rainfall,gauge-discharge data,and topographic and hydraulic *** this article,a flood forecast model is developed for the Godavari Basin,India through a distributed modelling approach using space *** approach includes rainfall runoff modelling,hydrodynamic flow routing,calibration,and validation of the model with field discharge *** study basin is divided into 128 subbasins to improve the model *** and hydraulic parameters of each subbasin and channel are computed using the land use/land cover grid that is derived from the Indian Remote Sensing Satellite(IRS–P6) AWi FS sensor data(56 m resolution),Shuttled Radar Topographic Mission(SRTM) Digital Elevation Model(DEM),and the soil textural *** model is calibrated using the field hydrometeorological data of 2000 and validated with the data of *** model was tested during the 2010 floods with real-time 3-hour interval hydrometeorological and daily evapotranspiration *** in estimating the peak flood discharge and lag time was found to be very *** forecast lead time is increased by 12 hours compared to conventional methods of forecasting.

关键词： flood rainfall meteorological

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Investigation of structural,magnetic and optical properties of rare earth substituted bismuth ferrite

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Journal of Rare Earths 2013年第4期31卷 370-375页

作者： T.durga rao T.Karthik Saket Asthana Advanced Functional Materials Laboratory Department of PhysicsIndian Institute of Technology Hyderabad Department of Materials Science and Engineering Indian Institute of Technology Hyderabad

Polycrystalline BiFeO3 and rare earth substituted ***3 （BRFO, R=Y, Ho and Er） compounds were prepared by rapid solid state sintering technique. Structural phase analysis indicated that all the compounds stabilized in rhombohedral structure （R3c space group） and a small orthorhombic phase fraction was observed in BRFO compounds. From the Raman spectra results, the changes in the phonon frequencies （A1） and line widths suggested lattice distortion in the BRFO compounds as was evidenced in the XRD analysis. Compared to the linear variation of magnetization with magnetic field （M-H） shown by BFO, an obvious M-H loop was observed in BRFO compounds which could be due to the suppression of space modulated spin structure and was explained on the basis of weak ferromagnetism and field induced spin reorientation. UV-Vis spectroscopy evidenced a change in local FeO6 envi- ronment due to shift in the 6Alg→4T2g energy transition band. BRFO compounds with improved remnant magnetization and coercive field are applicable for magnetoelectric devices.

关键词： structural distortion spin-reorientation G-type antiferromagnet rare earths

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Development and Validation of Stability Indicating HPLC Method for Simultaneous Estimation of Amoxicillin and Clavulanic Acid in Injection

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American Journal of Analytical Chemistry 2010年第3期1卷 95-101页

作者： durga Mallikarjuna rao Tippa N. Singh 不详

A simple, fast, precise, accurate and rugged stability indicating high performance liquid chromatography (HPLC) method has been developed for simultaneous estimation of Amoxicillin and Clavulanic acid from injectable dosage form. The stability indicating capability of the method was proven by subjecting the drugs to stress conditions as per ICH recommended test conditions such as alkaline and acid hydrolysis, oxidation, photolysis, thermal degradation and resolution of the degradation products formed therein. The separation was obtained using a mobile phase composition at a ratio of 95:5 (v/v) of pH 5.0 buffer and methanol on Inertsil C18 column (250 × 4.0 mm, 4 μm) with UV detection at 220 nm at a flow rate of 1 ml/minute. The photodiode array detector was used for stress studies. The order of elution of peaks was Clavulanic acid followed by Amoxicillin. The linear calibration range was found to be 79.51 to 315.32 μg/ml for Amoxicillin and 17.82 to 67.90 μg/ml for Clavulanic acid. The Amoxicillin and Clavulanic acid were found to be stable in solution up to 24 hours. The method validation data showed excellent results for precision, linearity, specificity, limit of detection, limit of quantification and robustness. The present method can be successfully used for routine quality control and stability studies.

关键词： Amoxicillin Clavulanic Acid HPLC Stability Indicating

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大高良姜根茎提取物对小鼠的镇痛作用(英文)

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中西医结合学报 2011年第1期9卷 100-104页

作者： Sahana Devadasa Acharya Sheetal Dinkar Ullal Shivaraj Padiyar Yalla durga rao Kousthubha Upadhyaya durga Pillai Vishnu Raj Department of Pharmacology Kasturba Medical CollegeManipal University Department of Dravyaguna National Institute of Ayurveda

目的:评价大高良姜(Alpinia galanga)根茎的乙醇提取物对小鼠的镇痛作用并推断其可能的机制。方法:使用3个实验模型分别测定大高良姜根茎提取物对白化病小鼠(体质量25～30g)的镇痛作用。热板实验中,30只小鼠被分为5组,每组6只,分别给予... 详细信息

目的:评价大高良姜(Alpinia galanga)根茎的乙醇提取物对小鼠的镇痛作用并推断其可能的机制。方法:使用3个实验模型分别测定大高良姜根茎提取物对白化病小鼠(体质量25～30g)的镇痛作用。热板实验中,30只小鼠被分为5组,每组6只,分别给予口服3种剂量的大高良姜根茎乙醇提取物、皮下注射吗啡以及口服2%的阿拉伯树胶,记录给药30、60、90和120min后的热板实验反应时间。纳洛酮预处理热板实验中,另外30只小鼠在给予上述药物30min之前皮下注射纳洛酮,给药种类及方式同前,热板实验反应时间记录方式同前。扭体实验中,通过腹腔注射醋酸诱导小鼠产生扭体反应,随后30只小鼠被分为5组,每组6只,分别给予口服3种剂量的大高良姜根茎乙醇提取物、阿司匹林及2%的阿拉伯树胶,每只小鼠观察15min,记录扭体次数。结果:各个时间记录点的数据表明,与对照组相比,3种剂量的大高良姜根茎乙醇提取物均显著延长了热板实验中小鼠的反应时间(P<0.05,P<0.01)。经纳洛酮预处理后,实验组及阳性对照药吗啡组小鼠的热板实验反应时间较对应的前一实验中未经纳洛酮处理各组小鼠显著延长(P<0.05,P<0.01)。扭体实验中,与对照组相比,3种剂量的大高良姜根茎乙醇提取物均减少了实验小鼠的扭体次数(P<0.01)。结论:本实验证实了大高良姜根茎提取物的镇痛作用,验证了其在民族医学中治疗各种原因引起的疼痛的应用。其镇痛作用的机制可能是有效成分作用于中枢或外周神经系统。

关键词：大高良姜植物提取物镇痛药疼痛测定受体阿片样小鼠

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